media: docs: brainless mass add SPDX headers to all media files
All Documentation files outside the uAPI are all licensed with,
at least, GPL 2.0. So, mark them as such.
The ondes at media/uapi are at least GFDL 1.1+.
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
diff --git a/Documentation/media/kapi/cec-core.rst b/Documentation/media/kapi/cec-core.rst
index bca1d9d..3ce26b7 100644
--- a/Documentation/media/kapi/cec-core.rst
+++ b/Documentation/media/kapi/cec-core.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GPL-2.0
+
CEC Kernel Support
==================
